Datasheet

DS7147 Rev 10 49/103
STM8S003F3 STM8S003K3 Electrical characteristics
87
9.3 Operating conditions
The device must be used in operating conditions that respect the parameters in Table 19. In
addition, full account must be taken of all physical capacitor characteristics and tolerances.
Figure 9. f
CPUmax
versus V
DD
Table 19. General operating conditions
Symbol Parameter Conditions Min Max Unit
f
CPU
Internal CPU clock frequency - 0 16 MHz
V
DD
Standard operating voltage - 2.95 5.5 V
V
CAP
(1)
1. Care should be taken when selecting the capacitor, due to its tolerance, as well as the parameter
dependency on temperature, DC bias and frequency in addition to other factors. The parameter maximum
values must be respected for the full application range.
C
EXT
: capacitance of external
capacitor
- 470 3300 nF
ESR of external capacitor
At 1 MHz
(2)
2. This frequency of 1 MHz as a condition for V
CAP
parameters is given by the design of the internal regulator.
-0.3ohm
ESL of external capacitor - 15 nH
P
D
(3)
3. To calculate P
Dmax
(T
A
), use the formula P
Dmax
= (T
Jmax
- T
A
)/Θ
JA
(see Section 10.4: Thermal
characteristics on page 96) with the value for T
Jmax
given in Table 19 above and the value for Θ
JA
given in
Table 55: Thermal characteristics.
Power dissipation at
T
A
= 85° C for suffix 6
TSSOP20 - 238
mWUFQFPN20 - 220
LQFP32 - 330
T
A
Ambient temperature for 6
suffix version
Maximum power dissipation -40 85
°C
T
J
Junction temperature range
for 6 suffix version
- -40 105
16
12
8
4
0
2.95
4.0
5.0
5.5
f
CPU (MHz)
Functionality guaranteed
@T
A -40 to 85 °C
Supply voltage
MS36411V1
Functionality
not guaranteed
in this area